Production of radiators



Nam 8, H932. T. E. MURRAY, JR

PRODUCTION OF RADIATORS 2 Sheets-Sheet Filed oct. 8. 1928 2710/0615 ZM/PEA ,VK/?.

Nw. S, w32 T. E. MURRAY, JR

PRODUCTION OF RADIA TORS Patented Nov. 8, 1932 UNITED STATES PATENT OFFICE THOIAS E. MURRAY, JB. OF BROOKLYN, NEW YORK, ASSIGNOB, BY HESNE ASSIGN- IENTB,`TO AMERICAN' RADIATOR PORATION OF DELAWARE STANDARD SANITARY CORPORATION, AMOOR- PRODUCTION OF BADIATOBS Application mcd October 8, 1928. Serial No. 310,959.

In certain priorapplications, I have described a t e of radiator havlng a longltudinal heating element on the opposlte sides of which are applied thin sheets corrugated in horizontal section, providing an extended area for heatin the air and causing a rapid draft thereof tlgi passages formed by the corrugations. The present invention provides certaln improvements in radiators of this and similar styles, and in the method of manufacturing them.

The accompanying drawings illustrate one embodiment of the invention.

Fig. 1 is a plan and Fig. 2 an elevation of a radiator;

Figs. 3 and 4' are horizontal sections through a tube and a joint respectively;

Fig. 5 is a vertical transverse section;

Fig. 6 is a section similar to Fig. 4 illustrating a modiiication;

Figs. 7 and 8 are similar sections illustrating successive stages in the production of an alternative design.

Figs. 9 and 10 are modifications of Figs. 6 and 8 respectively.

The heating element is a tube 1 for conveying steam or other heating medium, preferably made of thin copper for high conductivity. (Apparatus of this sort are also used for cooling the air of a room by passing cold brine or the like through the tube).

Applied to the opposite sides of the pipe are sheets, preferably also of thin copper, corrugated in the manner shown. The inward corrugations have vertical longitudinal portions 2 which are bent out at intervals to form recessed portions pipes 1. At both sides of the portion 2 the sheet extends outward in portions 4 which diverge until they reach the outer sides of the tube l. Each outward corrugation comprises what we may call an inner segment composed of two transverse portions 4, and an outer segment which is widely rounded at both sides 5 and projecting in the longitudinal direction beyond the intermediate connecting portions 6. Thus the transverse portions of each outward corrugation converge towards the heating element to about the point of engagement therewith and then rough the vertical ilues and 3 embracing the v diverge to the edges of the inner longitudinal portion 2.

This shape has certain advantages which will be appreciated by comparison with the shape shown in previous ap lications, indicated in dotted lines at 7 (Epig. 3) and employing the same quantity of sheet metal and the same area. Instead of rather narrow and angular vertical iues and passages, the new shape presents widely rounded spaces which permit an easier How of air through them. The complete width of the radiator is materially reduced.

In the particular case illustrated, there is a reduction of about twenty-five per cent in the floor space occupied by the radiator. In the new shape, each of the corrugations is stiffer. The rounded sides 5 projecting beyond the connecting portion 6 protect the latter from accidental blows and deformation. The appearance of the com lete radiator is also considerably improve The corrugated sheets may be applied to the steam pipe or other heating element by any usual or suitable means. According to the drawings, straps 8, preferably of steel, are provided with recessed portions 9 embracing the portions 3 of the sheets and clamping them together about the pipe 1; the opposite straps being united above and below the tubes by welds 10 passing through the portions 2 of the sheets. If we call the space 11 within the outward corrugations spaces 12 outside tlues, it will be observed that the diverging parts 5 of the sheet serve t0 substantially or approximately close these outside iiues and thus toincrease the draft through them.

The narrowest part of these outside iues is narrower than the straps 9. The straps may be introduced by assembling the parts while the sheets are shaped with wider spaces between the outward corrugations, as with the shape 7, and subsequently re-shaping the sheets.

The spaces at the outer side of the outside flues may be further narrowed by bringing the sides closer together. In Fig. 6 for example, the sides are brought nearly together across the outside flues 12. They may indeed inside iues and the e loo be brought into actual contact, though this would not substantially change the elect as compared with the leaving of a. nartow slit. See 5b, Fig. 9. r

In Fig. 8 the corrugations are shown of a somewhat different shape. The sheets are applied to the tube 1 in the form shown in .F1g. 7 with sides having parallel portions 13 and outwardly converging portions 14 connected at their edges by a channel-shaped portion 15. After assembling the parts in this shape the corrugations are re-shaped by bending them inward as shown in Fig. 8. This leaves each of the inside fines 11 bounded by a protecting rib 15a on the outside with diverging outer walls 14;a and converging inner walls 13", formed from the parts 15, 14 and 13 respectively.

The ribs 15n serve the same purpose of protecting the face of the radiator from accidental injury which is served by the projecting portions 5 of Figs. 4 and 6.

The outside fiues 12 are bounded by sides 13a which at their outer edges substantially or approximately close the flues (or may be shaped to entirely close them as at 14", Fig. 10). This shape has functions similar to those of Figs. 4 and 6. The inside lues 11 constitute wide 'spaces at the sides of the tube 1 through which spaces the heated air flows freely. The spaces between these wide inside flues bear a comparatively small ratio to the spaces Within the inside iues; and these intermediate spaces 12 are also substantially closed so as to constitute flues in which a better draft is maintained than would be the case with open channels.

Various other kinds of heating element may be used. For example, the tube may be flattened transversely to occupy less width, or may be a single narrow chamber instead of the successive lengths of tubing illustrated. Or it may be an electric heater; of the strip ty e, for example.

referably the extended area structure is united to the heating element, by the welded straps illustrated or in other ways, before reshaping it, though the re-shaping can be effected after the parts are assembled and before they are actually united. Preferably also the corrugated sheet is integral and continuous for the full length of the radiator, at each side, as shown; though this is not essential, the sheet referred to in the following claims being either of the full length shown or of less length. And it will be understood that the extended area structure may be applied to only one side of the heating element as described in certain of said prior applications, though for most uses, the radiator will include two such structures applied to opposite sides of the heating element.

No claim is made in the present application for the radiators themselves, these being covered in a divisional application, Serial No. 378,653, filed July 16, 1929.

Various modifications may be made by those skilled in the art without departure from the invention as defined in the following claims.

I claim:

1. In the production of radiators of the type described, the method which consists in first forming a sheet of extended area into a shape which facilitates its application to the heating element, applying it thereto and thereafter reshaping it to form inside and outside flues.

2. In the production of radiators of the type described, the method which consists in first forming a sheet of extended area into a shape which facilitates its application to the heating element, applying it thereto and thereafter reshaping it to form filles all of which are substantially closed in crosssection.

3. In the production of radiators of the type described, the method which consists in applying separate extended area structures to opposite sides of a heating element and thereafter reshaping the outer portions of said structures.

4. In the production of radiators of the type described. the method which consists in applying separate extended area structures to opposite sides of a heating element and thereafter compressing said structures so as to reduce the total width of the radiator.

5. In the production of radiators of the type described, the method which consists in applying a corrugated plate to a heating element. fastening the inner face of the plate at intervals along the length of the heating Y element, and thereafter reshaping the outer portion of the plate.

6. In the production of radiators of the type described. the method which consists in applying corrugated plates to opposite sides of a heating element, fastening the inner faces of the plates at intervals along the length of the heating element and thereafter reshaping the outer portion of at least one of said plates.

7. In the production of radiators of the type described, the method which consists in applving corrugated plates to opposite sides of a heating element. fastening the inner faces of the plates at intervals along the length of the heating element and thereafter reducing the depths of the eorrugations of at least one of said plates.

8. In the production of radiators of the type described` the method which consists in taking a heating element, securing corrugated plates to opposite sides thereof, and compressing the outer bends of the corrugations of at least one of said plates and bringing their outer portions into closer proximity.

' talnng a 1n taking a sof 9. In the production of radiators of the type described, the method which consists in taking a heating element, securing corrugated plates to opposite sides thereof at intervals along the length of said heating element, and flattening the outer bends of the corrugations of at least one of said plates and bringing the outer portions of said outer bends into closer 10. In th proximity. e production of radiators of the type described, the method which consists in heating element, securing COITII'- gated plates to opposite sides thereof, subjecting the outer bends .at least one of said plates to of the corrugations of pressure whereby to reduce the depth and increase the width thereof.

11. In the production of radiators of the type described, the method which consists rugated plates of at least one of heating element, securing corto opposite sides thereof, subjecting the outer bends of said plates the corrugations to pressure whereby to flatten said outer bends to form a substantially fiat outer wall 12. In th e production of radiators of the radiator.

of the type described, the method which consists in taking a heating element, securing corrugated plates to opposite sides thereof, subjecting the outer bends of the corrugations of at least one of said plates to pressure whereby to form a series of parallel substantially flat portions slightly separated from each other and the radiator.

13. In the production of type described, the method tak ed forming a substantially flat `outer wall of radiators of the which consists in mg a heating element, applying corrugatplates to opposite sides thereof, securing said plates at the inner bends of their corrugations to' said heating element, subjecting the outer bends of the corrugations of at least one of said plates to pressure whereby to co1- lapse the same into a series of shallow projections having substantially flat outer faces in close proximity and ly Hat outer wall of th 14. In the type describe heating element thereafter re-shaping structure between said 15. In the forming a substantiale radiator.

t e portions of said fasteners.

production of radiators of the type described, the method which consists in ormmg an extended area structure with inner and outer a heating element gaging said lnner portions, fastening the same to by means of fasteners enportions, and thereafter reshaping said outer portions.

16. In th e production of radiators of the type described, the method which consists in forming a sheet with 5 outward corrugations,

alternate inward and fastening said sheet to a heating element at the inward corrugations,

and thereafter reshaping the outwar gations.

In witness whereof, I have ymy name.

hereunto signed THOMAS E. MURRAY, JR.

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